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@angular/material

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/** * @license * Copyright Google LLC All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ import { FocusMonitor } from '@angular/cdk/a11y'; import { ENTER, hasModifierKey, SPACE } from '@angular/cdk/keycodes'; import { Attribute, ChangeDetectionStrategy, ChangeDetectorRef, Component, Directive, ElementRef, Host, Inject, Input, numberAttribute, Optional, ViewEncapsulation, ANIMATION_MODULE_TYPE, } from '@angular/core'; import { EMPTY, merge, Subscription } from 'rxjs'; import { filter } from 'rxjs/operators'; import { matExpansionAnimations } from './expansion-animations'; import { MatExpansionPanel, MAT_EXPANSION_PANEL_DEFAULT_OPTIONS, } from './expansion-panel'; import * as i0 from "@angular/core"; import * as i1 from "./expansion-panel"; import * as i2 from "@angular/cdk/a11y"; /** * Header element of a `<mat-expansion-panel>`. */ export class MatExpansionPanelHeader { constructor(panel, _element, _focusMonitor, _changeDetectorRef, defaultOptions, _animationMode, tabIndex) { this.panel = panel; this._element = _element; this._focusMonitor = _focusMonitor; this._changeDetectorRef = _changeDetectorRef; this._animationMode = _animationMode; this._parentChangeSubscription = Subscription.EMPTY; /** Tab index of the header. */ this.tabIndex = 0; const accordionHideToggleChange = panel.accordion ? panel.accordion._stateChanges.pipe(filter(changes => !!(changes['hideToggle'] || changes['togglePosition']))) : EMPTY; this.tabIndex = parseInt(tabIndex || '') || 0; // Since the toggle state depends on an @Input on the panel, we // need to subscribe and trigger change detection manually. this._parentChangeSubscription = merge(panel.opened, panel.closed, accordionHideToggleChange, panel._inputChanges.pipe(filter(changes => { return !!(changes['hideToggle'] || changes['disabled'] || changes['togglePosition']); }))).subscribe(() => this._changeDetectorRef.markForCheck()); // Avoids focus being lost if the panel contained the focused element and was closed. panel.closed .pipe(filter(() => panel._containsFocus())) .subscribe(() => _focusMonitor.focusVia(_element, 'program')); if (defaultOptions) { this.expandedHeight = defaultOptions.expandedHeight; this.collapsedHeight = defaultOptions.collapsedHeight; } } /** * Whether the associated panel is disabled. Implemented as a part of `FocusableOption`. * @docs-private */ get disabled() { return this.panel.disabled; } /** Toggles the expanded state of the panel. */ _toggle() { if (!this.disabled) { this.panel.toggle(); } } /** Gets whether the panel is expanded. */ _isExpanded() { return this.panel.expanded; } /** Gets the expanded state string of the panel. */ _getExpandedState() { return this.panel._getExpandedState(); } /** Gets the panel id. */ _getPanelId() { return this.panel.id; } /** Gets the toggle position for the header. */ _getTogglePosition() { return this.panel.togglePosition; } /** Gets whether the expand indicator should be shown. */ _showToggle() { return !this.panel.hideToggle && !this.panel.disabled; } /** * Gets the current height of the header. Null if no custom height has been * specified, and if the default height from the stylesheet should be used. */ _getHeaderHeight() { const isExpanded = this._isExpanded(); if (isExpanded && this.expandedHeight) { return this.expandedHeight; } else if (!isExpanded && this.collapsedHeight) { return this.collapsedHeight; } return null; } /** Handle keydown event calling to toggle() if appropriate. */ _keydown(event) { switch (event.keyCode) { // Toggle for space and enter keys. case SPACE: case ENTER: if (!hasModifierKey(event)) { event.preventDefault(); this._toggle(); } break; default: if (this.panel.accordion) { this.panel.accordion._handleHeaderKeydown(event); } return; } } /** * Focuses the panel header. Implemented as a part of `FocusableOption`. * @param origin Origin of the action that triggered the focus. * @docs-private */ focus(origin, options) { if (origin) { this._focusMonitor.focusVia(this._element, origin, options); } else { this._element.nativeElement.focus(options); } } ngAfterViewInit() { this._focusMonitor.monitor(this._element).subscribe(origin => { if (origin && this.panel.accordion) { this.panel.accordion._handleHeaderFocus(this); } }); } ngOnDestroy() { this._parentChangeSubscription.unsubscribe(); this._focusMonitor.stopMonitoring(this._element); } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.0", ngImport: i0, type: MatExpansionPanelHeader, deps: [{ token: i1.MatExpansionPanel, host: true }, { token: i0.ElementRef }, { token: i2.FocusMonitor }, { token: i0.ChangeDetectorRef }, { token: MAT_EXPANSION_PANEL_DEFAULT_OPTIONS, optional: true }, { token: ANIMATION_MODULE_TYPE, optional: true }, { token: 'tabindex', attribute: true }], target: i0.ɵɵFactoryTarget.Component }); } static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "17.0.0", version: "18.0.0", type: MatExpansionPanelHeader, isStandalone: true, selector: "mat-expansion-panel-header", inputs: { expandedHeight: "expandedHeight", collapsedHeight: "collapsedHeight", tabIndex: ["tabIndex", "tabIndex", (value) => (value == null ? 0 : numberAttribute(value))] }, host: { attributes: { "role": "button" }, listeners: { "click": "_toggle()", "keydown": "_keydown($event)" }, properties: { "attr.id": "panel._headerId", "attr.tabindex": "disabled ? -1 : tabIndex", "attr.aria-controls": "_getPanelId()", "attr.aria-expanded": "_isExpanded()", "attr.aria-disabled": "panel.disabled", "class.mat-expanded": "_isExpanded()", "class.mat-expansion-toggle-indicator-after": "_getTogglePosition() === 'after'", "class.mat-expansion-toggle-indicator-before": "_getTogglePosition() === 'before'", "class._mat-animation-noopable": "_animationMode === \"NoopAnimations\"", "style.height": "_getHeaderHeight()" }, classAttribute: "mat-expansion-panel-header mat-focus-indicator" }, ngImport: i0, template: "<span class=\"mat-content\" [class.mat-content-hide-toggle]=\"!_showToggle()\">\n <ng-content select=\"mat-panel-title\"></ng-content>\n <ng-content select=\"mat-panel-description\"></ng-content>\n <ng-content></ng-content>\n</span>\n\n@if (_showToggle()) {\n <span [@indicatorRotate]=\"_getExpandedState()\" class=\"mat-expansion-indicator\">\n <svg\n xmlns=\"http://www.w3.org/2000/svg\"\n viewBox=\"0 -960 960 960\"\n aria-hidden=\"true\"\n focusable=\"false\">\n <path d=\"M480-345 240-585l56-56 184 184 184-184 56 56-240 240Z\"/>\n </svg>\n </span>\n}\n", styles: [".mat-expansion-panel-header{display:flex;flex-direction:row;align-items:center;padding:0 24px;border-radius:inherit;transition:height 225ms cubic-bezier(0.4, 0, 0.2, 1);height:var(--mat-expansion-header-collapsed-state-height);font-family:var(--mat-expansion-header-text-font);font-size:var(--mat-expansion-header-text-size);font-weight:var(--mat-expansion-header-text-weight);line-height:var(--mat-expansion-header-text-line-height);letter-spacing:var(--mat-expansion-header-text-tracking)}.mat-expansion-panel-header.mat-expanded{height:var(--mat-expansion-header-expanded-state-height)}.mat-expansion-panel-header[aria-disabled=true]{color:var(--mat-expansion-header-disabled-state-text-color)}.mat-expansion-panel-header:not([aria-disabled=true]){cursor:pointer}.mat-expansion-panel:not(.mat-expanded) .mat-expansion-panel-header:not([aria-disabled=true]):hover{background:var(--mat-expansion-header-hover-state-layer-color)}@media(hover: none){.mat-expansion-panel:not(.mat-expanded) .mat-expansion-panel-header:not([aria-disabled=true]):hover{background:var(--mat-expansion-container-background-color)}}.mat-expansion-panel .mat-expansion-panel-header:not([aria-disabled=true]).cdk-keyboard-focused,.mat-expansion-panel .mat-expansion-panel-header:not([aria-disabled=true]).cdk-program-focused{background:var(--mat-expansion-header-focus-state-layer-color)}.mat-expansion-panel-header._mat-animation-noopable{transition:none}.mat-expansion-panel-header:focus,.mat-expansion-panel-header:hover{outline:none}.mat-expansion-panel-header.mat-expanded:focus,.mat-expansion-panel-header.mat-expanded:hover{background:inherit}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before{flex-direction:row-reverse}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 16px 0 0}[dir=rtl] .mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 0 0 16px}.mat-content{display:flex;flex:1;flex-direction:row;overflow:hidden}.mat-content.mat-content-hide-toggle{margin-right:8px}[dir=rtl] .mat-content.mat-content-hide-toggle{margin-right:0;margin-left:8px}.mat-expansion-toggle-indicator-before .mat-content.mat-content-hide-toggle{margin-left:24px;margin-right:0}[dir=rtl] .mat-expansion-toggle-indicator-before .mat-content.mat-content-hide-toggle{margin-right:24px;margin-left:0}.mat-expansion-panel-header-title{color:var(--mat-expansion-header-text-color)}.mat-expansion-panel-header-title,.mat-expansion-panel-header-description{display:flex;flex-grow:1;flex-basis:0;margin-right:16px;align-items:center}[dir=rtl] .mat-expansion-panel-header-title,[dir=rtl] .mat-expansion-panel-header-description{margin-right:0;margin-left:16px}.mat-expansion-panel-header[aria-disabled=true] .mat-expansion-panel-header-title,.mat-expansion-panel-header[aria-disabled=true] .mat-expansion-panel-header-description{color:inherit}.mat-expansion-panel-header-description{flex-grow:2;color:var(--mat-expansion-header-description-color)}.mat-expansion-indicator::after{border-style:solid;border-width:0 2px 2px 0;content:\"\";display:inline-block;padding:3px;transform:rotate(45deg);vertical-align:middle;color:var(--mat-expansion-header-indicator-color);display:inline-block;display:var(--mat-expansion-legacy-header-indicator-display, inline-block)}.mat-expansion-indicator svg{width:24px;height:24px;margin:0 -8px;vertical-align:middle;fill:var(--mat-expansion-header-indicator-color);display:none;display:var(--mat-expansion-header-indicator-display, none)}.cdk-high-contrast-active .mat-expansion-panel-content{border-top:1px solid;border-top-left-radius:0;border-top-right-radius:0}"], animations: [matExpansionAnimations.indicatorRotate], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.0", ngImport: i0, type: MatExpansionPanelHeader, decorators: [{ type: Component, args: [{ selector: 'mat-expansion-panel-header', encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, animations: [matExpansionAnimations.indicatorRotate], host: { 'class': 'mat-expansion-panel-header mat-focus-indicator', 'role': 'button', '[attr.id]': 'panel._headerId', '[attr.tabindex]': 'disabled ? -1 : tabIndex', '[attr.aria-controls]': '_getPanelId()', '[attr.aria-expanded]': '_isExpanded()', '[attr.aria-disabled]': 'panel.disabled', '[class.mat-expanded]': '_isExpanded()', '[class.mat-expansion-toggle-indicator-after]': `_getTogglePosition() === 'after'`, '[class.mat-expansion-toggle-indicator-before]': `_getTogglePosition() === 'before'`, '[class._mat-animation-noopable]': '_animationMode === "NoopAnimations"', '[style.height]': '_getHeaderHeight()', '(click)': '_toggle()', '(keydown)': '_keydown($event)', }, standalone: true, template: "<span class=\"mat-content\" [class.mat-content-hide-toggle]=\"!_showToggle()\">\n <ng-content select=\"mat-panel-title\"></ng-content>\n <ng-content select=\"mat-panel-description\"></ng-content>\n <ng-content></ng-content>\n</span>\n\n@if (_showToggle()) {\n <span [@indicatorRotate]=\"_getExpandedState()\" class=\"mat-expansion-indicator\">\n <svg\n xmlns=\"http://www.w3.org/2000/svg\"\n viewBox=\"0 -960 960 960\"\n aria-hidden=\"true\"\n focusable=\"false\">\n <path d=\"M480-345 240-585l56-56 184 184 184-184 56 56-240 240Z\"/>\n </svg>\n </span>\n}\n", styles: [".mat-expansion-panel-header{display:flex;flex-direction:row;align-items:center;padding:0 24px;border-radius:inherit;transition:height 225ms cubic-bezier(0.4, 0, 0.2, 1);height:var(--mat-expansion-header-collapsed-state-height);font-family:var(--mat-expansion-header-text-font);font-size:var(--mat-expansion-header-text-size);font-weight:var(--mat-expansion-header-text-weight);line-height:var(--mat-expansion-header-text-line-height);letter-spacing:var(--mat-expansion-header-text-tracking)}.mat-expansion-panel-header.mat-expanded{height:var(--mat-expansion-header-expanded-state-height)}.mat-expansion-panel-header[aria-disabled=true]{color:var(--mat-expansion-header-disabled-state-text-color)}.mat-expansion-panel-header:not([aria-disabled=true]){cursor:pointer}.mat-expansion-panel:not(.mat-expanded) .mat-expansion-panel-header:not([aria-disabled=true]):hover{background:var(--mat-expansion-header-hover-state-layer-color)}@media(hover: none){.mat-expansion-panel:not(.mat-expanded) .mat-expansion-panel-header:not([aria-disabled=true]):hover{background:var(--mat-expansion-container-background-color)}}.mat-expansion-panel .mat-expansion-panel-header:not([aria-disabled=true]).cdk-keyboard-focused,.mat-expansion-panel .mat-expansion-panel-header:not([aria-disabled=true]).cdk-program-focused{background:var(--mat-expansion-header-focus-state-layer-color)}.mat-expansion-panel-header._mat-animation-noopable{transition:none}.mat-expansion-panel-header:focus,.mat-expansion-panel-header:hover{outline:none}.mat-expansion-panel-header.mat-expanded:focus,.mat-expansion-panel-header.mat-expanded:hover{background:inherit}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before{flex-direction:row-reverse}.mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 16px 0 0}[dir=rtl] .mat-expansion-panel-header.mat-expansion-toggle-indicator-before .mat-expansion-indicator{margin:0 0 0 16px}.mat-content{display:flex;flex:1;flex-direction:row;overflow:hidden}.mat-content.mat-content-hide-toggle{margin-right:8px}[dir=rtl] .mat-content.mat-content-hide-toggle{margin-right:0;margin-left:8px}.mat-expansion-toggle-indicator-before .mat-content.mat-content-hide-toggle{margin-left:24px;margin-right:0}[dir=rtl] .mat-expansion-toggle-indicator-before .mat-content.mat-content-hide-toggle{margin-right:24px;margin-left:0}.mat-expansion-panel-header-title{color:var(--mat-expansion-header-text-color)}.mat-expansion-panel-header-title,.mat-expansion-panel-header-description{display:flex;flex-grow:1;flex-basis:0;margin-right:16px;align-items:center}[dir=rtl] .mat-expansion-panel-header-title,[dir=rtl] .mat-expansion-panel-header-description{margin-right:0;margin-left:16px}.mat-expansion-panel-header[aria-disabled=true] .mat-expansion-panel-header-title,.mat-expansion-panel-header[aria-disabled=true] .mat-expansion-panel-header-description{color:inherit}.mat-expansion-panel-header-description{flex-grow:2;color:var(--mat-expansion-header-description-color)}.mat-expansion-indicator::after{border-style:solid;border-width:0 2px 2px 0;content:\"\";display:inline-block;padding:3px;transform:rotate(45deg);vertical-align:middle;color:var(--mat-expansion-header-indicator-color);display:inline-block;display:var(--mat-expansion-legacy-header-indicator-display, inline-block)}.mat-expansion-indicator svg{width:24px;height:24px;margin:0 -8px;vertical-align:middle;fill:var(--mat-expansion-header-indicator-color);display:none;display:var(--mat-expansion-header-indicator-display, none)}.cdk-high-contrast-active .mat-expansion-panel-content{border-top:1px solid;border-top-left-radius:0;border-top-right-radius:0}"] }] }], ctorParameters: () => [{ type: i1.MatExpansionPanel, decorators: [{ type: Host }] }, { type: i0.ElementRef }, { type: i2.FocusMonitor }, { type: i0.ChangeDetectorRef }, { type: undefined, decorators: [{ type: Inject, args: [MAT_EXPANSION_PANEL_DEFAULT_OPTIONS] }, { type: Optional }] }, { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE] }] }, { type: undefined, decorators: [{ type: Attribute, args: ['tabindex'] }] }], propDecorators: { expandedHeight: [{ type: Input }], collapsedHeight: [{ type: Input }], tabIndex: [{ type: Input, args: [{ transform: (value) => (value == null ? 0 : numberAttribute(value)), }] }] } }); /** * Description element of a `<mat-expansion-panel-header>`. */ export class MatExpansionPanelDescription { static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.0", ngImport: i0, type: MatExpansionPanelDescription, deps: [], target: i0.ɵɵFactoryTarget.Directive }); } static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.0.0", type: MatExpansionPanelDescription, isStandalone: true, selector: "mat-panel-description", host: { classAttribute: "mat-expansion-panel-header-description" }, ngImport: i0 }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.0", ngImport: i0, type: MatExpansionPanelDescription, decorators: [{ type: Directive, args: [{ selector: 'mat-panel-description', host: { class: 'mat-expansion-panel-header-description', }, standalone: true, }] }] }); /** * Title element of a `<mat-expansion-panel-header>`. */ export class MatExpansionPanelTitle { static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.0", ngImport: i0, type: MatExpansionPanelTitle, deps: [], target: i0.ɵɵFactoryTarget.Directive }); } static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.0.0", type: MatExpansionPanelTitle, isStandalone: true, selector: "mat-panel-title", host: { classAttribute: "mat-expansion-panel-header-title" }, ngImport: i0 }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.0", ngImport: i0, type: MatExpansionPanelTitle, decorators: [{ type: Directive, args: [{ selector: 'mat-panel-title', host: { class: 'mat-expansion-panel-header-title', }, standalone: true, }] }] }); //# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {FocusableOption, FocusMonitor, FocusOrigin} from '@angular/cdk/a11y';\nimport {ENTER, hasModifierKey, SPACE} from '@angular/cdk/keycodes';\nimport {\n  AfterViewInit,\n  Attribute,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  Directive,\n  ElementRef,\n  Host,\n  Inject,\n  Input,\n  numberAttribute,\n  OnDestroy,\n  Optional,\n  ViewEncapsulation,\n  ANIMATION_MODULE_TYPE,\n} from '@angular/core';\nimport {EMPTY, merge, Subscription} from 'rxjs';\nimport {filter} from 'rxjs/operators';\nimport {MatAccordionTogglePosition} from './accordion-base';\nimport {matExpansionAnimations} from './expansion-animations';\nimport {\n  MatExpansionPanel,\n  MatExpansionPanelDefaultOptions,\n  MAT_EXPANSION_PANEL_DEFAULT_OPTIONS,\n} from './expansion-panel';\n\n/**\n * Header element of a `<mat-expansion-panel>`.\n */\n@Component({\n  selector: 'mat-expansion-panel-header',\n  styleUrl: 'expansion-panel-header.css',\n  templateUrl: 'expansion-panel-header.html',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  animations: [matExpansionAnimations.indicatorRotate],\n  host: {\n    'class': 'mat-expansion-panel-header mat-focus-indicator',\n    'role': 'button',\n    '[attr.id]': 'panel._headerId',\n    '[attr.tabindex]': 'disabled ? -1 : tabIndex',\n    '[attr.aria-controls]': '_getPanelId()',\n    '[attr.aria-expanded]': '_isExpanded()',\n    '[attr.aria-disabled]': 'panel.disabled',\n    '[class.mat-expanded]': '_isExpanded()',\n    '[class.mat-expansion-toggle-indicator-after]': `_getTogglePosition() === 'after'`,\n    '[class.mat-expansion-toggle-indicator-before]': `_getTogglePosition() === 'before'`,\n    '[class._mat-animation-noopable]': '_animationMode === \"NoopAnimations\"',\n    '[style.height]': '_getHeaderHeight()',\n    '(click)': '_toggle()',\n    '(keydown)': '_keydown($event)',\n  },\n  standalone: true,\n})\nexport class MatExpansionPanelHeader implements AfterViewInit, OnDestroy, FocusableOption {\n  private _parentChangeSubscription = Subscription.EMPTY;\n\n  constructor(\n    @Host() public panel: MatExpansionPanel,\n    private _element: ElementRef,\n    private _focusMonitor: FocusMonitor,\n    private _changeDetectorRef: ChangeDetectorRef,\n    @Inject(MAT_EXPANSION_PANEL_DEFAULT_OPTIONS)\n    @Optional()\n    defaultOptions?: MatExpansionPanelDefaultOptions,\n    @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string,\n    @Attribute('tabindex') tabIndex?: string,\n  ) {\n    const accordionHideToggleChange = panel.accordion\n      ? panel.accordion._stateChanges.pipe(\n          filter(changes => !!(changes['hideToggle'] || changes['togglePosition'])),\n        )\n      : EMPTY;\n    this.tabIndex = parseInt(tabIndex || '') || 0;\n\n    // Since the toggle state depends on an @Input on the panel, we\n    // need to subscribe and trigger change detection manually.\n    this._parentChangeSubscription = merge(\n      panel.opened,\n      panel.closed,\n      accordionHideToggleChange,\n      panel._inputChanges.pipe(\n        filter(changes => {\n          return !!(changes['hideToggle'] || changes['disabled'] || changes['togglePosition']);\n        }),\n      ),\n    ).subscribe(() => this._changeDetectorRef.markForCheck());\n\n    // Avoids focus being lost if the panel contained the focused element and was closed.\n    panel.closed\n      .pipe(filter(() => panel._containsFocus()))\n      .subscribe(() => _focusMonitor.focusVia(_element, 'program'));\n\n    if (defaultOptions) {\n      this.expandedHeight = defaultOptions.expandedHeight;\n      this.collapsedHeight = defaultOptions.collapsedHeight;\n    }\n  }\n\n  /** Height of the header while the panel is expanded. */\n  @Input() expandedHeight: string;\n\n  /** Height of the header while the panel is collapsed. */\n  @Input() collapsedHeight: string;\n\n  /** Tab index of the header. */\n  @Input({\n    transform: (value: unknown) => (value == null ? 0 : numberAttribute(value)),\n  })\n  tabIndex: number = 0;\n\n  /**\n   * Whether the associated panel is disabled. Implemented as a part of `FocusableOption`.\n   * @docs-private\n   */\n  get disabled(): boolean {\n    return this.panel.disabled;\n  }\n\n  /** Toggles the expanded state of the panel. */\n  _toggle(): void {\n    if (!this.disabled) {\n      this.panel.toggle();\n    }\n  }\n\n  /** Gets whether the panel is expanded. */\n  _isExpanded(): boolean {\n    return this.panel.expanded;\n  }\n\n  /** Gets the expanded state string of the panel. */\n  _getExpandedState(): string {\n    return this.panel._getExpandedState();\n  }\n\n  /** Gets the panel id. */\n  _getPanelId(): string {\n    return this.panel.id;\n  }\n\n  /** Gets the toggle position for the header. */\n  _getTogglePosition(): MatAccordionTogglePosition {\n    return this.panel.togglePosition;\n  }\n\n  /** Gets whether the expand indicator should be shown. */\n  _showToggle(): boolean {\n    return !this.panel.hideToggle && !this.panel.disabled;\n  }\n\n  /**\n   * Gets the current height of the header. Null if no custom height has been\n   * specified, and if the default height from the stylesheet should be used.\n   */\n  _getHeaderHeight(): string | null {\n    const isExpanded = this._isExpanded();\n    if (isExpanded && this.expandedHeight) {\n      return this.expandedHeight;\n    } else if (!isExpanded && this.collapsedHeight) {\n      return this.collapsedHeight;\n    }\n    return null;\n  }\n\n  /** Handle keydown event calling to toggle() if appropriate. */\n  _keydown(event: KeyboardEvent) {\n    switch (event.keyCode) {\n      // Toggle for space and enter keys.\n      case SPACE:\n      case ENTER:\n        if (!hasModifierKey(event)) {\n          event.preventDefault();\n          this._toggle();\n        }\n\n        break;\n      default:\n        if (this.panel.accordion) {\n          this.panel.accordion._handleHeaderKeydown(event);\n        }\n\n        return;\n    }\n  }\n\n  /**\n   * Focuses the panel header. Implemented as a part of `FocusableOption`.\n   * @param origin Origin of the action that triggered the focus.\n   * @docs-private\n   */\n  focus(origin?: FocusOrigin, options?: FocusOptions) {\n    if (origin) {\n      this._focusMonitor.focusVia(this._element, origin, options);\n    } else {\n      this._element.nativeElement.focus(options);\n    }\n  }\n\n  ngAfterViewInit() {\n    this._focusMonitor.monitor(this._element).subscribe(origin => {\n      if (origin && this.panel.accordion) {\n        this.panel.accordion._handleHeaderFocus(this);\n      }\n    });\n  }\n\n  ngOnDestroy() {\n    this._parentChangeSubscription.unsubscribe();\n    this._focusMonitor.stopMonitoring(this._element);\n  }\n}\n\n/**\n * Description element of a `<mat-expansion-panel-header>`.\n */\n@Directive({\n  selector: 'mat-panel-description',\n  host: {\n    class: 'mat-expansion-panel-header-description',\n  },\n  standalone: true,\n})\nexport class MatExpansionPanelDescription {}\n\n/**\n * Title element of a `<mat-expansion-panel-header>`.\n */\n@Directive({\n  selector: 'mat-panel-title',\n  host: {\n    class: 'mat-expansion-panel-header-title',\n  },\n  standalone: true,\n})\nexport class MatExpansionPanelTitle {}\n","<span class=\"mat-content\" [class.mat-content-hide-toggle]=\"!_showToggle()\">\n  <ng-content select=\"mat-panel-title\"></ng-content>\n  <ng-content select=\"mat-panel-description\"></ng-content>\n  <ng-content></ng-content>\n</span>\n\n@if (_showToggle()) {\n  <span [@indicatorRotate]=\"_getExpandedState()\" class=\"mat-expansion-indicator\">\n    <svg\n      xmlns=\"http://www.w3.org/2000/svg\"\n      viewBox=\"0 -960 960 960\"\n      aria-hidden=\"true\"\n      focusable=\"false\">\n      <path d=\"M480-345 240-585l56-56 184 184 184-184 56 56-240 240Z\"/>\n    </svg>\n  </span>\n}\n"]}